A 72-year-old Wanaka man found unfit to stand trial after being accused of attacking a police officer will face no further penalty.

Peter John Barratt was charged with assaulting a police officer with intent to obstruct, threatening to kill a senior constable and his daughters, threatening to kill a constable, resisting a constable and driving with a breath-alcohol level of 751 micrograms after an incident in Makarora on April 10.

Barratt appeared in the Queenstown District Court yesterday, where Judge Christina Cook ordered his immediate release without further penalty. Barrett had been admitted to Wakari Hospital in Dunedin on bail where a psychologist and psychiatrist found he had a mental impairment.